/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.spark.sql

import java.security.PrivilegedExceptionAction

import org.apache.hadoop.security.UserGroupInformation
import org.apache.spark.sql.catalyst.optimizer.{SubmarineDataMaskingExtension, SubmarinePushPredicatesThroughExtensions, SubmarineRowFilterExtension, SubmarineSparkRangerAuthorizationExtension}
import org.apache.spark.sql.execution.SubmarineSparkPlanOmitStrategy

object SubmarineSparkUtils {

  def withUser[T](user: String)(f: => T): T = {
    val ugi = UserGroupInformation.createRemoteUser(user)
    ugi.doAs(new PrivilegedExceptionAction[T] {
      override def run(): T = f
    })
  }

  def enableAuthorizer(spark: SparkSession): Unit = {
    spark.extensions.injectOptimizerRule(SubmarineSparkRangerAuthorizationExtension)
  }

  def enableRowFilter(spark: SparkSession): Unit = {
    spark.extensions.injectOptimizerRule(SubmarineRowFilterExtension)
    spark.extensions.injectOptimizerRule(SubmarinePushPredicatesThroughExtensions)
    spark.extensions.injectPlannerStrategy(SubmarineSparkPlanOmitStrategy)
  }

  def enableDataMasking(spark: SparkSession): Unit = {
    spark.extensions.injectOptimizerRule(SubmarineDataMaskingExtension)
    spark.extensions.injectOptimizerRule(SubmarinePushPredicatesThroughExtensions)
    spark.extensions.injectPlannerStrategy(SubmarineSparkPlanOmitStrategy)
  }

  def enableAll(spark: SparkSession): Unit = {
    spark.extensions.injectOptimizerRule(SubmarineSparkRangerAuthorizationExtension)
    spark.extensions.injectOptimizerRule(SubmarineRowFilterExtension)
    spark.extensions.injectOptimizerRule(SubmarineDataMaskingExtension)
    spark.extensions.injectOptimizerRule(SubmarinePushPredicatesThroughExtensions)
    spark.extensions.injectPlannerStrategy(SubmarineSparkPlanOmitStrategy)
  }
}
